One example: native document-based Mac apps have file handling functionality in the window's titlebar (rename, move, tag, etc). It's very convenient. Electron apps don't.

Another: native Mac apps by default reopen where you left off. Open windows, open documents, etc. Electron doesn't get this functionality automatically; you could spend time recreating it, but it still would integrate with native settings.

Another small example: native Mac UI controls reflect the system-wide accent color the user's selected. With Electron, you'd have to either spend time rebuilding the functionality or omit it.

Mac users like Macs because Macs work like Macs. Electron apps ignore the benefits and features Mac apps usually get automatically and just revert to the lowest common denominator.